The influence of chronic potassium deficiency on energy production, calcium metabolism and phospholipid composition of isolated heart mitochondria,

Ledwoch, W.; Greeff, K.; Heinen, E.; Noack, E.

doi:10.1016/0022-2828(79)90453-x

Cited by 11 publications

(2 citation statements)

References 14 publications

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“…The increase in P for both areas following K depletion is more difficult to explain, but may represent longer-term changes in oxidative phosphorylation. Alterations in mitochondrial function have been reported in this species following chronic K depletion (Ledwoch, Greeff, Heinen & Noack, 1979).…”

Section: Discussionmentioning

confidence: 99%

Subcellular elemental composition in isolated cardiac myocytes from rabbit following chronic potassium depletion and acute repletion, studied by X‐ray microanalysis

Ward

Warley²

1990

Experimental Physiology

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SUMMARYX-ray microanalysis was used to estimate K, Na, Cl, Mg, P and S within the mitochondria and the myofibrillar regions of cardiac myocytes from rabbits, following dietary potassium depletion. K depletion caused no changes in mitochondrial K, but myofibrillar K was reduced. There were no changes in Na, Mg or Cl. Both areas showed increases in P but decreases in S. Acute K repletion resulted in a significant overshoot of K in both areas, coupled with a profound decrease in Cl. P was reduced in the mitochondria alone. These results may be partly explained by adaptive changes in Nae pump activity.

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Section: Discussionmentioning

confidence: 99%

Subcellular elemental composition in isolated cardiac myocytes from rabbit following chronic potassium depletion and acute repletion, studied by X‐ray microanalysis

Ward

Warley²

1990

Experimental Physiology

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“…DPG is enriched in fatty acids with carbon chain lengths of 18, linoleic acid being the principal component, as shown in mitochondrial fractions of ovulated oocytes and early embryos of Bufo arenarum (Bonini de Romanelli et al, 1981). A similar composition has been registered in the majority of animal tissues and higher plants (Comte et al, 1976;Landriscina et al, 1976;Ledwoch et al, 1979;Schlame et al, 2000). In contrast, in yeast palmitoleic acid (16:1) and 18:1 seem to represent the main quantities, whereas in bacteria DPG possesses saturated and unsaturated fatty acids of 14 and 18 carbons (Jacovcic et al, 1971;Hoch, 1992).…”

Section: Resultsmentioning

confidence: 71%

Mitochondrial lipids in Bufo arenarum full-grown oocytes

Gili

Alonso

2004

Zygote

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Both the content and composition of polar and neutral lipids from the mitochondrial fraction of ovarian full-grown Bufo arenarum oocytes were analysed in the present study. Triacylglycerols (TAG) represent 33% of the total lipids, followed by phosphatidylcholine (PC), free fatty acids (FFA) and phosphatidylethanolamine (PE). Diphosphatidylglycerol (DPG) or cardiolipin, a specific component of the inner mitochondrial membrane, represents about 4% of the total lipid content. Palmitic (16:0) and arachidonic (20:4n6) acids are the most abundant fatty acids in PC and PE, respectively. DPG is enriched in fatty acids with carbon chain lengths of 18, the principal component being linoleic acid. In phosphatidylinositol (PI), 20:4n6 and stearic acid (18:0) represent about 72 mol% of the total acyl group level. The main fatty acids in TAG are linoleic (18:2), oleic (18:1), and palmitic acids. The fatty acid composition of FFA and diacylglycerols (DAG) is similar, 16:0 being the most abundant acyl group. PE is the most unsaturated lipid and sphingomyelin (SM) has the lowest unsaturation index.

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A comparison of three methods of soft ionization mass spectrometry of crude phospholipid extracts

Benfenati

Reginato

1985

Biol. Mass Spectrom.

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Many different classes of phospholipids were identified from crude extracts of hearts by three soft ionization mass spectrometric techniques: liquid matrix secondary ion mass spectrometry in the negative mode, (-)LSIMS, and in the positive mode, (+)LSIMS, and field desorption. (-)LSIMS and (+)LSIMS are complementary methods. In some cases it was possible to establish the fatty acid and aldehyde composition and position of some phospholipid classes, by the analysis of fragments.

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The influence of chronic potassium deficiency on energy production, calcium metabolism and phospholipid composition of isolated heart mitochondria,

Cited by 11 publications

References 14 publications

Subcellular elemental composition in isolated cardiac myocytes from rabbit following chronic potassium depletion and acute repletion, studied by X‐ray microanalysis

Subcellular elemental composition in isolated cardiac myocytes from rabbit following chronic potassium depletion and acute repletion, studied by X‐ray microanalysis

Mitochondrial lipids in Bufo arenarum full-grown oocytes

A comparison of three methods of soft ionization mass spectrometry of crude phospholipid extracts

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